668851804 has 6 divisors (see below), whose sum is σ = 1170490664. Its totient is φ = 334425900.

The previous prime is 668851793. The next prime is 668851873. The reversal of 668851804 is 408158866.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83606472 + ... + 83606479.

Almost surely, 2^668851804 is an apocalyptic number.

It is an amenable number.

668851804 is a deficient number, since it is larger than the sum of its proper divisors (501638860).

668851804 is a wasteful number, since it uses less digits than its factorization.

668851804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167212955 (or 167212953 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 46.

The square root of 668851804 is about 25862.1693598971. The cubic root of 668851804 is about 874.5338704761.

The spelling of 668851804 in words is "six hundred sixty-eight million, eight hundred fifty-one thousand, eight hundred four".